Final answer:
The Era of Good Feelings was a period of national unity and optimism in the United States between 1815 and 1828.
Step-by-step explanation:
The Era of Good Feelings refers to a period of time in the United States between 1815 and 1828. It was characterized by a sense of national unity and optimism following the War of 1812. During this era, there was one-party rule, with the Democratic-Republicans dominating the political landscape. American leaders worked to promote a stronger and more self-sufficient United States, implementing policies such as the chartering of the Second Bank of the United States and the approval of a protective tariff.